4.

Aetanthus zonatus Diels (Diels 1941: 368)

Type

ECUADOR • Pastaza: Mera, tall trees in primary forest on river banks; 3 Dec. 1938; H. Schulze-Rhonhof 3070; B †.

Neotype

ECUADOR • Pastaza: Mera, on Melastomataceae; Harling 3799; neotype (designated by Kuijt 2009): S n. v.; isoneotypes: GB n. v., R [R 000172185].

Iconography

Kuijt (1983: fig. 3); Kuijt (2009: fig. 163).

Notes

Psittacanthus zonatus is a plant with terete internodes, paired leaves with a leaf margin heavily callused, inflorescences arranged in umbels of 4–6 triads, with inflorescence ramifications and cupules prominently furfuraceous, the flower bud is straight and it narrows to a 1 cm long, black neck, with petals more or less isomorphic, basal ligules absent, stamens slightly dimorphic, with anthers backed by long, red hairs on the adjacent petal (Kuijt 2009). It was described from southern Andean Ecuador and adjacent Peru (Kuijt 2009), expanding its distribution to Amazonas and Caquetá departments in Colombia (Fig. 3).

Additional specimens examined

ECUADOR – Morona Santiago • Plan del Milagro at cross-road between Limon and Indanza, on Vismia [Hypericaceae]; 1600–1700 m; 24 Apr. 1985; fl.; Harling & Andersson 24572; MBM [MBM 163866], NY, UC [UC 1958089] • Along Rio Palora, 1–4 km upstream from Arapicos; 800–900 m; 14 Apr. 1981; fl.; Lugo 6088; UC [UC 1958091], US [US 03655955] • 2–5 km downstream from Arapicos; 800–900 m; 9 Apr. 1981; fl.; Lugo 6040; F [V 0200424 F], NY, UC [UC 1892892] • Colonia Azuay, 2 km from Arapicos; 800–900 m; 18 Apr. 1981; fl.; Lugo 6120; MBM [MBM 115371], NY, UC [UC 1958084] • About 1 / 2 hour by car along unfinished road E of El Limon; 1000 m; 5 Feb. 1989; fl.; Van der Werff & Palacios 10422; HUA [HUA 0008529], K [K 005345745], NY. – Napo-Pastaza • 18 km of NE of Puyo on road to Puerto Napo; 1620 m; 9 Jan. 1965; fl.; Wiens 3728; UC [UC 1958087], US [US 03655954] • 12 km W of Shell Mera; 1300 m; 9 Jan. 1965; fl.; Wiens 3734; UC [UC 1958088]. – Pastaza • Forest on bank of Rio Mangayacu; 1100 m; 9 Dec. 1955; fl.; Asplund 18763; K [K 005345746], NY • 31 km N of Puyo on road to Tena, side road E to Cajabamba; 1°15’S, 77°50’W; 1000 m; 24 Dec. 1987; fl.; Boom et al. 7784; NY, UC [UC 1958090] • Cantón Pastaza; site of ARCO Central Processing Facility, 33 km E of Puyo, Colonia Bolívar; 1°23’S, 77°45’W; 1000 m; 15 Dec. 1997; fl.; Neill 11042; HUA [HUA 0015170], UC [UC 1958093] • Mera; 1000 m; 17 Jan. 1982; fl.; Harling et al. 19648; UC [UC 1958092] • Road Mera-Pastaza (Shell Mera); 1000–1050 m; 16 Jul. 1967; fl.; Sparre 17541; NY, P [P 05096835]. – Zamora Chinchipe • In the vicinity of the mining camp at the Rio Tundaime, along road to military base El Condor; 3°37’31”S, 78°26’26”W; 1000 m; 5 Nov. 2004; Van der Werff et al. 19321; HUA [HUA 0015150], NY, US [US 03655953], UC [UC 1958082].

COLOMBIA – Amazonas • La Chorrera, comunidad de Vegsam, margen derecha del río Igará-Paraná; 1°23’53.0”S, 72°48’59.0”W; 190 m; 7 Sep. 2019; fl.; Cárdenas et al. 51700; COAH [COAH 110330] • La Chorrera; 12 Feb. 2023; fl.; Vélez & Funoratofe 8225; COAH [COAH 123851] • La Chorrera; 1°13’21.75”S, 72°56’25.03”W; 28 Jul. 2023; fl.; Castaño et al. 14354; COAH [COAH 125134]. – Caquetá • Belén de los Andaquíes, camino Andaquí, vía que comunica el municipio de Acevedo con Belén; 1°41’34.5”N, 75°54’25.1”W; 1300–1500 m; 9 Mar. 2016; fl.; Cárdenas et al. 45784; COAH, NY [NY 04123191] • Belén de los Andaquíes, Parque Natural Municipal Andaquí, Cabeceras del río Pescado; 1°41’52.6”N, 75°54’15.9”W; 1608 m; 25 Jan. 2017; fl.; Castaño et al. 8757; COAH [COAH 95397].

PERU – Huánuco • Prov. Pachitea, region of Pucallpa, W part of “ Sira Mountains ” and adjacent lowland, ca 24 km SE of Puerto Inca, from “ Campamento Sira ” SE down to valley of Rio Negro; 9°28’S, 74°47’W; 500–800 m; 12 Feb. 1988; fr.; Morawetz & Wallnöfer 14-12288; UC [UC 1958086] • W part of “ Sira Mountains ” and adjacent lowland, crest of the mountain range going W to E from the “ Campamento Oro ” to the “ Campamento Sira ”, on Melastomataceae; 800 m; 27 Nov. 1987; fl.; Wallnöfer & Fernandez 12-271187; UC [UC 1958085]. – Pasco • Oxapampa, Distrito Palcazu, Parque Nacional Yanachaga Chemillén, a una hora de la Estación Biológica Paujil; 10°20’S, 75°15’W; 780 m; 25 Oct. 2002; fl.; Monteagudo et al. 4263; UC [UC 1958083].